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<h2><span class="refentrytitle"><a name="rvtk-frame.top_of_page"></a>frame</span></h2>
<p>frame — Video Frame</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="rvtk-frame.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">

#include &lt;rvtk/v4l2.h&gt;

                    <a class="link" href="rvtk-frame.html#VidSize" title="VidSize">VidSize</a>;
                    <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a>;
<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a>*           <a class="link" href="rvtk-frame.html#vidFrameCreate" title="vidFrameCreate ()">vidFrameCreate</a>                      ();
void                <a class="link" href="rvtk-frame.html#vidFrameRef" title="vidFrameRef ()">vidFrameRef</a>                         (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
void                <a class="link" href="rvtk-frame.html#vidFrameUnref" title="vidFrameUnref ()">vidFrameUnref</a>                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);
void                <a class="link" href="rvtk-frame.html#vidFrameRelease" title="vidFrameRelease ()">vidFrameRelease</a>                     (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);
void                <a class="link" href="rvtk-frame.html#vidFrameModify" title="vidFrameModify ()">vidFrameModify</a>                      (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);
void                <a class="link" href="rvtk-frame.html#vidFrameCache" title="vidFrameCache ()">vidFrameCache</a>                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);
int                 <a class="link" href="rvtk-frame.html#vidFrameChangeFormat" title="vidFrameChangeFormat ()">vidFrameChangeFormat</a>                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame,
                                                         <a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> format,
                                                         int width,
                                                         int height);
int                 <a class="link" href="rvtk-frame.html#vidFrameGetWidth" title="vidFrameGetWidth ()">vidFrameGetWidth</a>                    (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
int                 <a class="link" href="rvtk-frame.html#vidFrameGetHeight" title="vidFrameGetHeight ()">vidFrameGetHeight</a>                   (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
int                 <a class="link" href="rvtk-frame.html#vidFrameGetImageLength" title="vidFrameGetImageLength ()">vidFrameGetImageLength</a>              (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
int                 <a class="link" href="rvtk-frame.html#vidFrameGetBufferLength" title="vidFrameGetBufferLength ()">vidFrameGetBufferLength</a>             (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
unsigned char*      <a class="link" href="rvtk-frame.html#vidFrameGetImageData" title="vidFrameGetImageData ()">vidFrameGetImageData</a>                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
<a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a>            <a class="link" href="rvtk-frame.html#vidFrameGetFormat" title="vidFrameGetFormat ()">vidFrameGetFormat</a>                   (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
int                 <a class="link" href="rvtk-frame.html#vidFrameResizeBuffer" title="vidFrameResizeBuffer ()">vidFrameResizeBuffer</a>                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame,
                                                         int length);
int                 <a class="link" href="rvtk-frame.html#vidFrameGetRowStride" title="vidFrameGetRowStride ()">vidFrameGetRowStride</a>                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
void                <a class="link" href="rvtk-frame.html#vidFrameCopy" title="vidFrameCopy ()">vidFrameCopy</a>                        (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest,
                                                         int deep);
<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a>*           <a class="link" href="rvtk-frame.html#vidFrameClone" title="vidFrameClone ()">vidFrameClone</a>                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);
int                 (<a class="link" href="rvtk-frame.html#v4l2ConvFunc" title="v4l2ConvFunc ()">*v4l2ConvFunc</a>)                     (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest);
                    <a class="link" href="rvtk-frame.html#VidConv" title="VidConv">VidConv</a>;
<a class="link" href="rvtk-frame.html#VidConv" title="VidConv">VidConv</a>*            <a class="link" href="rvtk-frame.html#vidConvFind" title="vidConvFind ()">vidConvFind</a>                         (<a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> input,
                                                         <a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> output);
int                 <a class="link" href="rvtk-frame.html#vidConvProcess" title="vidConvProcess ()">vidConvProcess</a>                      (<a class="link" href="rvtk-frame.html#VidConv" title="VidConv">VidConv</a> *conv,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="rvtk-frame.description"></a><h2>Description</h2>
<p>
Video Frame</p>
<p>

</p>
</div>
<div class="refsect1" lang="en">
<a name="rvtk-frame.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="VidSize"></a><h3>VidSize</h3>
<pre class="programlisting">typedef struct {
	/// The width 
	int width;
	/// The height
	int height;
} VidSize;
</pre>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="VidFrame"></a><h3>VidFrame</h3>
<pre class="programlisting">typedef struct {
	/// A frame may be named.
	char *name;
	
	/// A read only frame is used togather with mmap operation. 
	int readonly;
	
	/// The size of frame
	VidSize size;	

	/// The image type(fourcc) 
	fourcc_t format;
	
	/// Row stride
	int bytesperline;
	
	/// Excepted image size of current format. 
	int imagesize;
	
	/// The size of data/buffer allocated to hold image. It should be larger than or equal to imagesize
	int buflen; 
	
	/// Pointer to image data.
	unsigned char *data;
	
	/// the last modified time.
	struct timeval	timestamp;
	
	/// refcount
	int refcount;
} VidFrame;
</pre>
<p>

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameCreate"></a><h3>vidFrameCreate ()</h3>
<pre class="programlisting"><a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a>*           vidFrameCreate                      ();</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameRef"></a><h3>vidFrameRef ()</h3>
<pre class="programlisting">void                vidFrameRef                         (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameUnref"></a><h3>vidFrameUnref ()</h3>
<pre class="programlisting">void                vidFrameUnref                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameRelease"></a><h3>vidFrameRelease ()</h3>
<pre class="programlisting">void                vidFrameRelease                     (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameModify"></a><h3>vidFrameModify ()</h3>
<pre class="programlisting">void                vidFrameModify                      (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameCache"></a><h3>vidFrameCache ()</h3>
<pre class="programlisting">void                vidFrameCache                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> **frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>


</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameChangeFormat"></a><h3>vidFrameChangeFormat ()</h3>
<pre class="programlisting">int                 vidFrameChangeFormat                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame,
                                                         <a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> format,
                                                         int width,
                                                         int height);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>format</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetWidth"></a><h3>vidFrameGetWidth ()</h3>
<pre class="programlisting">int                 vidFrameGetWidth                    (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetHeight"></a><h3>vidFrameGetHeight ()</h3>
<pre class="programlisting">int                 vidFrameGetHeight                   (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetImageLength"></a><h3>vidFrameGetImageLength ()</h3>
<pre class="programlisting">int                 vidFrameGetImageLength              (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetBufferLength"></a><h3>vidFrameGetBufferLength ()</h3>
<pre class="programlisting">int                 vidFrameGetBufferLength             (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetImageData"></a><h3>vidFrameGetImageData ()</h3>
<pre class="programlisting">unsigned char*      vidFrameGetImageData                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetFormat"></a><h3>vidFrameGetFormat ()</h3>
<pre class="programlisting"><a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a>            vidFrameGetFormat                   (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameResizeBuffer"></a><h3>vidFrameResizeBuffer ()</h3>
<pre class="programlisting">int                 vidFrameResizeBuffer                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame,
                                                         int length);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameGetRowStride"></a><h3>vidFrameGetRowStride ()</h3>
<pre class="programlisting">int                 vidFrameGetRowStride                (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameCopy"></a><h3>vidFrameCopy ()</h3>
<pre class="programlisting">void                vidFrameCopy                        (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest,
                                                         int deep);</pre>
<p>
</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dest</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>deep</code></em> :</span></p></td>
<td> Perform a deep copy. If FALSE, it will simply allocate a buffer without copy the data.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="vidFrameClone"></a><h3>vidFrameClone ()</h3>
<pre class="programlisting"><a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a>*           vidFrameClone                       (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *frame);</pre>
<p>
</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>frame</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> A cloned frame with refcount equal to 1.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="v4l2ConvFunc"></a><h3>v4l2ConvFunc ()</h3>
<pre class="programlisting">int                 (*v4l2ConvFunc)                     (<a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest);</pre>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dest</code></em> :</span></p></td>
<td>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<div class="refsect2" lang="en">
<a name="VidConv"></a><h3>VidConv</h3>
<pre class="programlisting">typedef struct {
	/// Name of the converter
	char *name;
	/// The input image format(fourcc)
	fourcc_t input;
	/// The output image format(fourcc))
	fourcc_t output;
	
	/// The callback function to handle the convertion
	v4l2ConvFunc convert;	
} VidConv;
</pre>
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</p>
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<div class="refsect2" lang="en">
<a name="vidConvFind"></a><h3>vidConvFind ()</h3>
<pre class="programlisting"><a class="link" href="rvtk-frame.html#VidConv" title="VidConv">VidConv</a>*            vidConvFind                         (<a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> input,
                                                         <a class="link" href="rvtk-fourcc.html#fourcc-t" title="fourcc_t">fourcc_t</a> output);</pre>
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<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
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<td><p><span class="term"><em class="parameter"><code>output</code></em> :</span></p></td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<div class="refsect2" lang="en">
<a name="vidConvProcess"></a><h3>vidConvProcess ()</h3>
<pre class="programlisting">int                 vidConvProcess                      (<a class="link" href="rvtk-frame.html#VidConv" title="VidConv">VidConv</a> *conv,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *src,
                                                         <a class="link" href="rvtk-frame.html#VidFrame" title="VidFrame">VidFrame</a> *dest);</pre>
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<td><p><span class="term"><em class="parameter"><code>conv</code></em> :</span></p></td>
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<td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td>
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<td><p><span class="term"><em class="parameter"><code>dest</code></em> :</span></p></td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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